Ohm's Law | Engineering Calculator API

Ohm's Law API

Compute voltage, current, resistance, or derived power using Ohm's Law. This endpoint is ideal for students, engineers, and developers performing circuit analysis, electrical design, or physics calculations.

Law

$V = I \cdot R$

Derived forms:

$I = \frac{V}{R}$

$R = \frac{V}{I}$

Power (optional derived):

$P = V \cdot I$

Request Body

1{
2  "law": "ohms",
3  "vars": {
4    "V": null,
5    "V_i": null,
6    "V_f": null,
7    "I": null,
8    "I_i": null,
9    "I_f": null,
10    "R": null,
11    "R_i": null,
12    "R_f": null
13  }
14}

Variables

Behavior Notes

• Computes missing $V$, $I$, $R$, or verifies consistency if all values are provided.

• Supports initial and final values to automatically compute deltas for voltage, current, or resistance.

• If all values are provided, the API checks that $V=IR$; inconsistency raises an error.

• Derived power is included automatically: $P=VI$.

• Division by zero (e.g., $R=0$ when solving for current) raises an error.

Example Requests

Solve for voltage

1{
2  "law": "ohms",
3  "vars": {
4    "I": 2,
5    "R": 10
6  }
7}

Solve for current

1{
2  "law": "ohms",
3  "vars": {
4    "V": 12,
5    "R": 6
6  }
7}

Solve for resistance

1{
2  "law": "ohms",
3  "vars": {
4    "V": 24,
5    "I": 4
6  }
7}

Verify consistency

1{
2  "law": "ohms",
3  "vars": {
4    "V": 24,
5    "I": 4,
6    "R": 6
7  }
8}

Example Response

1{
2  "solved": "V",
3  "value": 20,
4  "summary": "V = I·R = 20 V",
5  "inputs": {
6    "V": 20,
7    "I": 2,
8    "R": 10
9  },
10  "derived": {
11    "power": 40
12  }
13}

Use Cases

• Electrical circuit analysis

• Determining voltage, current, or resistance in circuits

• Physics and electronics education

• Power calculation using derived values

• Engineering and technical design